Journal
PHYSICAL REVIEW B
Volume 71, Issue 11, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.71.113410
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Two distinct pathways are characterized for dissociative chemisorption of methane on Pt{110}-(1x2). The transition states are obtained to high precision using a fully unconstrained technique involving hybrid eigenvector-following with variational eigenvector refinement and tangent space minimization. The two paths yield products where methyl occupies a ridge atop site, with the dissociated hydrogen in one of two distinct ridge bridge sites. Both pathways involve simultaneous stretching of a C-H bond and deformation of methane bond angles, in agreement with experimentally observed rate enhancement.
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